@imautistic have you been diagnosed with hypothyroidism? (low thyroid) People with hypothyroidism often struggle with being overweight. Is it possible that you mean hyperthyroidism (high thyroid)? These people often struggle with gaining weight. As @celia16 pointed out, fatigue could be caused by other things. When you mention going “through 2 doses”, what medication are you talking about? Is it a routine medication that you take everyday? Could you talk to the prescribing doctor about your fatigue and inability to gain weight? We members shouldn’t be trying to diagnose conditions or prescribing medications & dose changes. Not feeling well since last November is a long time.